Thanks for posting your query here.
Based on your description, I think your son needs some investigations to find cause of his problems and frequent vomiting
I don't agree with 'gastro' with the severe bouts of vomiting you've described.
Have you noticed any changes in behaviour/dizziness/swaying etc?
Does he get tummy pain before he starts throwing up?
What is the colour of his vomit?
Is his tummy distended during such episodes?
I would recommend following investigations: Ultrasound
Abdomen, Preliminary blood tests - Hb, Total Count, Peripheral Smear, Renal and liver
He needs to be examined thoroughly by a Pediatrician
and based on the results of the tests I've mentioned, further investigations may be needed to find cause (Gastric Volvulus
, malrotation, band etc in abdomen)
I hope I have been able to guide you further.
Dr Tejas Shah